Dedicated stretching machine for link link pre-stretching to increase strength
A technology for improving strength and linking links, applied in the direction of metal chains, etc., can solve problems such as high labor intensity, low production efficiency, and difficult clamping, and achieve the effects of high automation, fast operation, and compact structure
A technology for improving strength and linking links, applied in the direction of metal chains, etc., can solve problems such as high labor intensity, low production efficiency, and difficult clamping, and achieve the effects of high automation, fast operation, and compact structure
CN103691876BActive Publication Date: 2015-10-14CHINA COAL ZHANGJIAKOU COAL MINING MACHINERY
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[0015] like figure 1 , 2 As shown in , 3, the special stretching machine tool used for link pre-stretching to improve strength consists of stretching hydraulic cylinder 1, pressurized hydraulic cylinder 2, stretching mechanism 3, base 4, workpiece clamping mechanism 7, connecting mechanism 9. The bed 14 is formed. The stretching mechanism 3 is composed of a left slider 8 and a right slider 6. The right slider 6 is fixed on the right end of the bed 14, and the left slider 8 is connected to the piston rod of the stretching hydraulic cylinder 1 fixed on the left end of the bed 14. 9 are connected together and can move left and right along the groove-shaped slideway of the bed 14 with the extension and recovery of the piston rod. The adjacent ends of the left slider 8 and the right slider 6 are provided with T-shaped slots for mounting workpieces and clamping Mechanism 7 and bracket 5 are fixed on the lower part of the left and right sliders with bolts, and the upper end surface...
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The invention relates to the technical field of connecting ring production, in particular to a special stretching machine tool for prestretching connecting rings to improve strength. Mine connecting rings are required to be prestretched one by one to improve the fatigue strength, and the traditional stretching machine has the disadvantages of difficulty in clamping, low production efficiency and high labor intensity. The stretching machine tool comprises a stretching hydraulic cylinder, a booster hydraulic cylinder, a lathe bed, a stretching mechanism, a workpiece clamping mechanism and the like. The left end of the stretching mechanism is connected with a piston rod of the stretching hydraulic cylinder fixed to the left end of the lathe bed; the right end of the stretching mechanism is fixed to the body of the stretching machine tool; a trapezoidal clamping groove in the middle of the stretching mechanism accommodates the workpiece clamping mechanism; by extending and retreating the piston rod of the stretching hydraulic cylinder, conversion of stations such as installation, initial loading, loading and detaching of the stretching mechanism is realized; in the loading process, a pressurization system is used for improving tensile force to reach the prestretching load specified by the connecting rings. The special stretching machine tool is suitable for high-efficiency, quick and safe prestretching of the massively produced connecting rings.
Description
technical field [0001] The invention relates to the technical field of production and manufacture of link links, in particular to a special stretching machine tool used for pre-stretching link links to improve strength. Background technique [0002] The connecting link is an independent part of the chain connection, and it is an indispensable and important independent part of coal mine special equipment such as scraper conveyors on the working face, transfer machines, and coal plows. Regardless of any chain traction equipment, the quality and performance level of the connecting link and the chain are also one of the main indicators for evaluating the reliability and life of the whole machine. The main quality performance of the connecting link is breaking strength and fatigue strength. Strength, in the manufacturing process, it needs to be pre-stretched piece by piece after heat treatment. Using a traditional stretching machine, it is necessary to use a connecting link to co...
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Patent Timeline
14 Oct 2015
Publication
CN103691876B
- IPC
- B21L19/00
- Inventors
- 刘彪; 范国杰